Altcoins prices push the price of bitcoin up and down !!
if Altcoin is a simulation of bitcoin's path, so why not just bitcoin enough ??
Any altcoin owns its name, project and ideas, so why that altcoins are related in the pricing with bitcoin ??
first of all altcoins does not push btc anywhere.
Altcoins have a completely different purpose like eth/neo/eos and others they can be used to make tokens for your project, other alts are a lot faster than btc. Btc is not universal .